Transcript for Diane Sawyer's Personal Tour of the Presidential Library With the Former First Lady

Tonight a personal tour of the library with laura bush. You start with a brightly lit rooms and the great hopes of a new president before 9/11. Then suddenly that giant shadow. That's where they begin right at the start. And there's some hanging over there. This is a room of how you hoped it would be. That's right. This is what we thought we would be working on. Ge had campaigned on education reform. Then we turned the corner and everything changed. In an instant? In an instant. And we suddenly into this space. The shadow? That's right. So this is the big piece from the second tower of the world trade center the 82nd or 83rd floor where the plane hit, it's the point of impact. This says terrorism against america will not succeed. Join in a moment of silence for the victims and their families. Is it hard to walk through? It is. It's very hard to walk through and it's hard to watch this. Here we have a lot of things that had to do with pepfar, the president's emergency plan aids relief and the president's malaria initiative, which has saved millions of lives. So we're still working on these issues through the bush institute. I've spent a lot of time decorating the oval office. And this is as e as it was? This is exactly as it was. Takes you right back in a time capsule. This is the resolute desk, and had has everything including the little door that john john kennedy looked out of it in that famous photo from the oval office. Visitors to the museum can actually come in to the office, get their picture made. The office won't be roped off. So this is the end of this part of the museum. And so we're stepping from PRESIDENT, ON JANUARY 20th, 2009, to citizen. And that's the line that george used in his fare well address. Hard to carry a title that means more to me than any other -- citizen. A personal tour.

This transcript has been automatically generated and may not be 100% accurate.

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